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<title>pthread_attr_setinheritsched</title>
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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_000_007_1144">&nbsp;</a>NAME</h4><blockquote>
pthread_attr_setinheritsched, pthread_attr_getinheritsched
- set and get inheritsched attribute
(<b>REALTIME THREADS</b>)
</blockquote><h4><a name = "tag_000_007_1145">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

#include &lt;<a href="pthread.h.html">pthread.h</a>&gt;

int pthread_attr_setinheritsched(pthread_attr_t *<i>attr</i>,
    int <i>inheritsched</i>);
int pthread_attr_getinheritsched(const pthread_attr_t *<i>attr</i>, 
    int *<i>inheritsched</i>);
</code>
</pre>
</blockquote><h4><a name = "tag_000_007_1146">&nbsp;</a>DESCRIPTION</h4><blockquote>
The functions
<i>pthread_attr_setinheritsched()</i>
and
<i>pthread_attr_getinheritsched()</i>,
respectively, set and get the
<i>inheritsched</i>
attribute in the
<i>attr</i>
argument.
<p>
When the attribute objects are used by
<i><a href="pthread_create.html">pthread_create()</a></i>,
the
<i>inheritsched</i>
attribute determines how the other scheduling attributes of
the created thread are to be set:
<dl compact>

<dt>PTHREAD_INHERIT_SCHED<dd>

Specifies that the scheduling policy and associated attributes
are to be inherited from the creating thread, and the scheduling
attributes in this
<i>attr</i>
argument are to be ignored.

<dt>PTHREAD_EXPLICIT_SCHED<dd>

Specifies that the scheduling policy and associated attributes
are to be set to the corresponding values from this attribute object.

</dl>
<p>
The symbols PTHREAD_INHERIT_SCHED and PTHREAD_EXPLICIT_SCHED
are defined in the header
<i><a href="pthread.h.html">&lt;pthread.h&gt;</a></i>.
</blockquote><h4><a name = "tag_000_007_1147">&nbsp;</a>RETURN VALUE</h4><blockquote>
If successful, the
<i>pthread_attr_setinheritsched()</i>
and
<i>pthread_attr_getinheritsched()</i>
functions return zero.
Otherwise, an error number is returned to indicate the error.
</blockquote><h4><a name = "tag_000_007_1148">&nbsp;</a>ERRORS</h4><blockquote>
The 
<i>pthread_attr_setinheritsched()</i>
and
<i>pthread_attr_getinheritsched()</i>
functions will fail if:
<dl compact>

<dt>[ENOSYS]<dd>
The option _POSIX_THREAD_PRIORITY_SCHEDULING is not defined and the
implementation does not support the function.

</dl>
<p>
The
<i>pthread_attr_setinheritsched()</i>
function may fail if:
<dl compact>

<dt>[EINVAL]<dd>
The value of the attribute being set is not valid.

<dt>[ENOTSUP]<dd>
An attempt was made to set the attribute to an unsupported value.

</dl>
</blockquote><h4><a name = "tag_000_007_1149">&nbsp;</a>EXAMPLES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_007_1150">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
After these attributes have been set, a thread can be created with
the specified attributes using
<i><a href="pthread_create.html">pthread_create()</a></i>.
Using these routines does not affect the current running thread.
</blockquote><h4><a name = "tag_000_007_1151">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_000_007_1152">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="pthread_attr_init.html">pthread_attr_init()</a></i>,
<i><a href="pthread_attr_setscope.html">pthread_attr_setscope()</a></i>,
<i><a href="pthread_attr_setschedpolicy.html">pthread_attr_setschedpolicy()</a></i>,
<i><a href="pthread_attr_setschedparam.html">pthread_attr_setschedparam()</a></i>,
<i><a href="pthread_create.html">pthread_create()</a></i>,
<i><a href="pthread.h.html">&lt;pthread.h&gt;</a></i>,
<i><a href="pthread_setschedparam.html">pthread_setschedparam()</a></i>,
<i><a href="sched.h.html">&lt;sched.h&gt;</a></i>.
</blockquote><h4>DERIVATION</h4><blockquote>
Derived from the POSIX Threads Extension (1003.1c-1995)
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Copyright &copy; 1997 The Open Group
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